My current setup in the living room consists of a Sony 60 inch LED TV, a Vizio soundbar with wireless subwoofer, and a FireTV. My cable service is provided by AT&T Uverse, in truth you will read a ton of comments or reviews saying how horrible their service is, but their TV packages are legit and so I completely vouch for that part. The internet was subpar and so as soon as my deal with them was complete, I switched internet providers but kept their TV service.
I did want to document how I fixed a very annoying problem with my setup that others may be experiencing. If you have a Vizio soundbar and the sound is going up and down while you are watching TV then you will need to do the following: Turn off TruVolume. The technology is meant to levelize the audio between regular TV and commercials but sometimes it just doesn't play well with your devices. Turning it off fixed my problem and I bet it will fix yours as well.